I can't tell you how many times i've rolled new WoW characters over the years. I've actually reached my 50 limit at one point. I love to play alts for some reason.
So that being said, the more the merrier for me!

8 per server in beta I believe, but again, we'll have to wait for the final build to be certain, as I heard this number has fluctuated between 8 and 10. Either way, there are very few classes I would actually play anyways.

Minister of Propaganda - The EndbringersFormerly Deft Aklin - Regent of Dark Sovereignty/The Endbringers of Starsider“The art of war teaches us to rely not on the likelihood of the enemy’s not coming, but on our own readiness to receive him;
Not on the chance of his not attacking, but rather on the fact that we have made our position unassailable.” –The Art of War, Sun Tzuwevegotcookies.com